Lingenfelter L710050607 Lingenfelter Suburban & Yukon XL Fuel Pump 2007 v1.1 - Manual (Page 4)

6) Remove the O-ring from the end of the fuel pump hose or the top of
the filter. Save this O-ring as it will be re-used later on.
7) Remove the connector from the end of
the stock fuel pump wires.
8) Cut the new supplied fuel pump harness wires to 6” total length.
9) Strip the ends of the new fuel pump harness wires.
10) Crimp the Metri Pak terminals onto the new fuel pump harness
wires.
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11) Assemble the new fuel pump wires into the connector that was
removed from the old fuel pump wires. The black wire going into
terminal A and the red wire goes into terminal B.